php - 将 WordPress 帖子元转换为 PHP 数组

Question

我有一个像 MySql 这样的 Wordpress post 元

[{"field":"Email:1","title":"email","explanation_text":"","explanation_text_location":"","html_styling":"","text_to_display":"","show_title_field":"","pdf_file":"","pdf_file_button_styling":"","pdf_file_button_text":""}]

我需要将其转换为 PHP 数组。我使用以下代码将其作为数组。

$wpaf_field_title = maybe_unserialize(get_post_meta(52, '__wpaf_field_title', true));
print_r(json_encode($wpaf_field_title));

但它返回了我

"[{\"field\":\"Email:1\",\"title\":\"email\",\"explanation_text\":\"\",\"explanation_text_location\":\"\",\"html_styling\":\"\",\"text_to_display\":\"\",\"show_title_field\":\"\",\"pdf_file\":\"\",\"pdf_file_button_styling\":\"\",\"pdf_file_button_text\":\"\"}]" 

Answer 1

正如评论中所说，你必须使用 json_decode() 函数:

$json = '[{"field":"Email:1","title":"email","explanation_text":"","explanation_text_location":"","html_styling":"","text_to_display":"","show_title_field":"","pdf_file":"","pdf_file_button_styling":"","pdf_file_button_text":""}]';
$data = json_decode( $json );
var_dump( $data );

然后你会得到:

array(1) {
  [0]=>
  object(stdClass)#1 (10) {
    ["field"]=>
    string(7) "Email:1"
    ["title"]=>
    string(5) "email"
    ["explanation_text"]=>
    string(0) ""
    ["explanation_text_location"]=>
    string(0) ""
    ["html_styling"]=>
    string(0) ""
    ["text_to_display"]=>
    string(0) ""
    ["show_title_field"]=>
    string(0) ""
    ["pdf_file"]=>
    string(0) ""
    ["pdf_file_button_styling"]=>
    string(0) ""
    ["pdf_file_button_text"]=>
    string(0) ""
  }
}